4 Questions to be Addressed in Developing SpecificationsWhat is the function of the product?What is the state of the product?e.g. sizeWhat costs are involved?What sort of buying experience will customers encounter?What will be experienced in the field?Clausing, D., Total Quality Development,: A Step-By-Step Guide to World Class Concurrent Engineering, ASME Press, NY 1994, pp

8 House of Quality - NotesDesign ObjectiveWhat aspect of the design is this QFD analysis focused on?Customer NeedsSubjectively describe the voice of customer (VOC)What does the customer/sponsor say they want the design to do, or how it should performCustomer Needs ImportanceLinear Scale of 1-1010 = absolutely essential, 1 = unimportantNon-Linear Scale9 = Very Important3 = Somewhat Important1 = Not Very ImportantPair-wise Comparison

9 House of Quality – Notes (cont.)Design Specifications (Engineering Metrics)What must be achieved in order deliver the customer requirementsQuantifiableMeasurableRelationship MatrixRelationship between CUSTOMER NEDS and DESIGN SPECIFICATIONSFundamental question answered: “If the specification is successfully achieved, will the customer need be satisfied and to what degree”?9 = strong correlation3 = medium correlation1 = weak correlation

12 Relationship Matrix Evaluation: Tips for SuccessMaintain a high hurdle for significanceLess than 50% of the cells should be populatedUsually involves much discussion to build team consensusDo not allow the matrix to exceed 30 x 30Rank order customer needsSet a time limit then stopTake a poll at the beginning of each cellIf there is consensus, move onSanity CheckDoes the relationship make sense?Is it supported by field data?Clausing, D., Total Quality Development,: A Step-By-Step Guide to World Class Concurrent Engineering, ASME Press, NY 1994, pp

14 Conclusions So Far & What To Do NextMost important design specifications identifiedDo they make senseIf not, investigateIf so, these become the critical parameters to track through development and assign resources toAnalyze the degree of interdependence among the engineering metricsCorrelation RoofDevelop the next decomposition of the system parameters to subsystem parameters